Blast Radius
Support
What would happen if an asteroid hit your city? Blast Radius drops any asteroid anywhere on Earth and shows the damage on a real map, using published impact science.
Contact
Questions, bugs or ideas? Email blastradius@curfewapp.co. Please mention your iPhone model and iOS version if something isn’t working.
Frequently asked questions
I bought Pro but it’s locked on my new phone.
Open any Pro feature to reach the upgrade screen and tap “Restore purchase”, signed in with the same Apple ID you bought it with.
Is Pro a subscription?
No. It’s a single one-time purchase that unlocks everything forever and removes ads.
How are the results calculated?
Blast Radius uses the Earth Impact Effects Program equations (Collins, Melosh & Marcus, 2005) for the energy, crater, fireball, shock wave, heat and earthquake, NASA SEDAC population data for the people inside each ring, and NASA’s asteroid-risk casualty model. Results are estimates for education and entertainment, not predictions.
Will a real asteroid hit us?
No known asteroid is on a collision course with Earth. Blast Radius only shows “what if”.
How do I change ad privacy choices?
Open the upgrade screen and tap “Ad privacy choices” (shown where the law requires it), or change Tracking in iOS Settings → Privacy & Security.